Light-support



Dec. 30. 1924.

W. FOSTER LIGHT SUPPORT Filed Jan. 2. 1923 heett FINVENTOR M1? ORNEY w. FOSTER LIGHT SUPPORT Filed Jan. 2. 1925 3 Sheets-Sheet 2 ""mlmlllm Dec. 30. i 924.

y W. FOSTER LIGHT SUPPORT 5 Sheets-Sheet- 3 Filed Jan. 2. 1925 Patented Dec. 39, 1924.

warren starts earnn'r WILLIAM. FOSTER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO PHILIP CHASE, OF BALA, PENNSYLVANIA.

LIGHT-SUPPORT.

Application filed January 2, 1923. Serial No. 610,159.

To aZZ whom it may concern:

Be it known that T, TVILLIAM FOSTER, a citizen of the United States, and a resident of Philadelphia, Pa, have invented an improvement in Light-Supports, of whloh the following is a specification.

This invention relates to supports for street lamps, and with regard to certain more specific features, to a mast-arm and combined strain insulator and notched hanger. V

Among the several objects of the invention may be noted the provision of a sim ple and inexpensive support for street lamps; and the provision of a device of this character that is sightly in appearance, rugged in construction, and adapted to withstand severe service conditions. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists of the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structure hereinafter described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which is shown one of various possible embodiments of the invention, 9

Fig. 1 is a right side elevation of a preferred embodiment of the invention;

Fig, 2 is a plan of Fig. 1, omitting the street lamp, strain insulator and hanger;

F ig. 3 is a right side elevation of the insulator and hanger, on an enlarged scale; Fig. 4 is a front elevation of the insulator of Fig. 3;

Fig. 5 is a front elevation of of Fig. 3,

Fig. 6 is a horizontal section on the line 6-6 of Fig. 5; V

Fig. 7 is a left side elevation of the insulator, showingin solid lines the shape of the cap prior to installation, and in dotted lines the shape after installation; and

Fig. 8 is a central verticalsection on the line 88 of Fig, 7.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring now more particularly to Figs. .1 and 2 of the accompanying drawings, there is illustrated at 1 a pole to which are bolted the hanger two substantially horizontal pipes 3, 5 and a diagonal brace pipe 7. The word pipe is used herein as generic to devices of various cross-section (such as T, T, U, or angle) as Well as devices of hollow circular cross-section. The horizontal pipes are preferably held in position by av through-boit 9. The diagonal pipe is bolted as at 11 to a clevis 13 which inturn is bolted to the pole 1. The three pipes are connected to each other at their outer ends by means of an end pulley bracket 15 in which is mounted a sheave-wheel 17 around which passes a wire rope 19 having secured at its outer end a street lamp illustrated conventionally at 21. etween the rope 19 and lamp 21 an insulating hook 14 may be provided in case the voltage or other conditions of installation should require such insulation. The end pulley bracket may be provided with a hook 10 or other means for attaching a safety hanger 12 or other device for relieving the wire rope of the weight of the lamp except when it is being raised or lowered. Bolted to the pole 1, at a point adjacent the through-bolt 9, is a back pulley bracket 23 having therein a sheave-wheel 25 over which passes. the wire rope 19 above mentioned. This bracket is preferably so located that the pulley axis is in the same horizontal plane as the axes of the upper pipes 3, 5.

The end pulley bracket is preferably so constructed that the axis of the pulley 17 therein is at the intersection of the axis of the diagonal pipe 7 with the horizontal plane passing through the axes of the upper pipes 3, 5.

Through the end pulley bracket 15 extends a bolt or stud :20, preferably of bronze, which holds the two horizontal pipes 3, 5 firmly against the bracket 15 and at the same time acts as a bearing for the pulley 17. Lugs 24 (Figs. 1 and 2) on the bracket 15 aline the horizontal pipes 3, 5 and prevent rotation of the bracket with respect thereto.

Owing to the construction of the end pulley bracket 15 and pole clevis 13, the diagonal pipe 7 is of the same length as the horizontal pipes 3, 5. The three pipes are all provided with flattened ends 22 as inclicated in Figs. 1 and 2, and are interchangeable. These features reduce the number of different parts that need to be carried, and thereby add to the usefulness of the invention.

7 Upon the horizontal pipes there may be mounted brackets 29 t'or insulators .(not p p 7 H I H h l i to receives. 'iiook fnof's'hoti n) 'siiclfas re- 'pair nien tarr attached-to a suitable rope sho-wiiy'to" Ca r'ry"the 'lealds (not shown); to

' the lamp 21, it being. understoodthatsulficient slack-is provided in such leads topermit the lamp to be lowered.

' The Wire rope 19 passes downwardly from the back pulley 25 to av suitable strain insulator, which is secured tothe poie' in order to holdf'the lamp in raised position. v A preferred construction for tliispnrpose is illustrated. in Fig. 1 and on an enlarged "scale in Figs. 3 to 8.

' extending through thegreate"-part of its 7 malleable iron.

length; At one or niore places such as 39 the slot is "enlarged; At a plurality-oft places such as 41 the slot has an extension 1 to the left or right and thence'up- *wa'rdly, .With'preferably aridge or those opposite each such extension. 'The inner or rear portion of the hanger .(to the'iright in Fig. is cut away or hollowed outto the extent indicated by the dotted lines 49 in Fig. 4-.

.The'hanger is adapted to-cooperatew'ith a wood strain insulator 53 (Figs. 3 and t) having at its upperend a cap 55', and at itslower end av cap 57; both preferably of As indicated inzF-igs. 3& and 7+8, each cap has a' socket 59 the outer end of Which islinitia lly of larger diameter than the diameter of the respective portion of the insulator against which this end'ofthe socket bears after installation. The initial con tour. of'the sockets is sh own "infsolid "lines in Figs. 7-. and 8. When the so'cketsare applied to the Wood, they are slid over-the respective end portion of the Wood, and

then the ends of the sockets are squeezed inwardly to thedotted-line position igs. 7; and 8), in which position they remain thereafter and thus securely{clamp-the ends olithejwood; in

"-YThe uppercap has a clamp 61 (Figs. 3 and {ll-i1 0! the Wire rope '19 above described. This "clamp 'ca-n iprises' a hollow neck 63 through which the rope passes into the; enlarged body portion 65. The rope passes around thecentral boss 56 and emerges at the opening A bolt 60, lie'ld n'place by a nut 62, clamps .a washer tightly against the rope. Ribs '67 on merit in the clamp. A- projection GSI'on the rasher extends into, tl1eiaperture 69 or 70 to keep the Washer from rotating. Z

Lugs 72 on the'body portion prevent, rota-' inserts the hook into the eye 71-a'ndi'ein'oves' thelower 'cap from. the hanger, he can loWerthe-lamp, the rope per n tting him to controlth spee d ef de'scent of the lamp and "to raise the ltmp again when 'lfhe'lowercap 57iias o aistt'i'dWWcomprising av shankfofanda nose 77. l.

The stud 73 "eX'tfidSj the insulator is in normal position, and the shank thereof passes -through the-slot in the hanger 33. {The-"nose 7 7 at s'ueh time is. entirely behind the matia'ri'al'bht of which the central aperture 37 is taken. The contour of-said aperture andfits exear'Wardly when tensions-is such tl'iatf ivhen"the studf is in 1 any oithe notches (thatu n the-"upp'er end or any extension"4-1ior' in the upper end8l of the aperture) theins'ulator is held against accidental r'e-riioval because-the nose 77 is too' large to passtthi oirghi the aperture at any of such nornmi-iepeia iig' positions of the de vlice. in order-Ito re move the --insnlator and-studit is'necessary portion '(such' as' 39) "of the ape1'tfure,Where-,

ring;- 7

upon the Fstudrrmay" he pulled outwardly V (to thele i t in Fig. 3), the' no'sep'assing 7 through the aperture. When ft'he insulator is to be secured'to' the hanger the operator brings-the nose. 77 opposite.enlarQedpOrtion 39, inserts the .flOSe lhtO" the aperture, and then loners the" studdown' the llentral aperture andswingsit tol right-for left; as the caser'inay' beg'ffand allows the st ad" to pass s am-my to the 'res'pective'n .Ei'ittlllg' position; "whereupon he- 'reinoves the c hock" aboi edescri'ljed froni the ej e' -'7l.

By provldi-ng a- -pluralityofper hanger, and similarly the'iloiver eapl in'ay be used irith "other devices "to setting-the, wire rope orother as e11s -.-1r *dexfriceto i-the I insulator. I

.i'he' insulatoi" a11d han i also he used wlth'other t e I iii'ast ti xn;

and the mast-'a'rn1'= be u'sed iifith other il l iis fli ni- 2 posit ons for the-stud in the hanger, the' structure "f1 ha? devices for insulating the wire rope and securing it to the pole.

In view or theabove, it is believed that the various features of this invention will be clear without further elaboration, and it will be seen that with the apparatus herein described, the several objects or the 7 to the pole at a point forwardly of the securing point of said first members, a bracket, means extending therethrough and securing the outer ends of the first members to the bracket, and means on said bracket for securing the outer end of the third member thereto at a point rearwardly of the securing point of the first members to said bracket.

2. A mast-arm comprising three members adapted to be secured to a pole, one member at an angle to the other two, a bracket, a bolt extending therethrough and adapted to secure the outer ends of said two members to the bracket, a pulley journaled on said bolt, means for securing the outer end of the first member to the bracket, a bracket secured to the pole adjacent said two members, a pulley journaled in said bracket, a rope passing over the pulleys and adapted to carry at its outer end a street lamp; and a hanger therefor adapted to be attached to the pole.

3. A mast-arm comprising three members of the same length, two of them approximately horizontal and adapted to be secured to a pole, the third member extending diagonally and adapted to be secured to the pole, a bracket, a bolt extending therethrough and adapted to secure the outer ends of the horizontal members to the bracket, a pulley journaled on said bolt, means for securing the outer end of the diagonal member to the bracket, a bracket secured to the pole adj acent said horizontal members, and a pulley journaled in said bracket, each pulley having its axis substantially in the horizontal plane of the horizontal pipes.

4. A mast-arm comprising three pipes of the same length, two of them approximately horizontal and adapted to be secured to a pole by a through-bolt through the pole, the third pipe extending diagonally, means carrying the lower end of the third pipe and adapted to be secured to the pole, a bracket to which are secured the outer ends of the horizontal pipes, .a pulley journaled in said bracket, and means for securing the outer end of the diagonal pipe to the bracket. 5. A mast-arm'comprising three pipes of the same length, two of them approximately horizontal and adapted to be secured to a pole by a through-bolt through the pole, the third pipe extending diagonally, means carrying the lower end of the third pipe and adapted to be secured to the pole, a bracket to which are secured the outer ends of the horizontal pipes, a pulley journaled in said bracket, means for securing the outer end of the diagonal pipe to the bracket, a bracket secured to the pole adjacent said horizontal pipes, and a pulley journaled in said bracket.

6. A mast-arm comprising three pipes of the same length, two of them approximately horizontal and adapted to be secured to a pole by a through-bolt through the pole, the third pipe extending diagonally, means carrying the lower end of the third pipe and adapted to be secured to the pole, a bracket 2 to which are secured the outer ends of the horizontal pipes, a pulley journaled in said bracket, means for securing the outer end or" the diagonal pipe to the bracket, a bracket secured to the pole adjacent said horizontal pipes, a pulley journaled in said bracket, and a rope passing over the pulleys and adapted to carry, a street lamp.

7. A mast-arm comprising three pipes of the same length, two of them approximately horizontal and adapted to be secured to a pole by a. through-bolt through the pole, the third pipe extending diagonally, means carrying the lower end of the third pipe and adapted to be secured to the pole, a bracket to which are secured the outer ends of the horizontal pipes, a pulley journaled in said bracket, means for securing the out er end of the diagonal pipe to the bracket, a bracket secured to the pole adjacent said horizontal pipes, a pulley journaled in said bracket, each pulley having its axis substantially in the horizontal plane of the horizontal pipes, the axis of the outer pulley passing near or through the axis of the diagonal pipe, and a rope passing over the pulleys and adapted to carry a street lamp.

8. A mast-arm comprising three pipes of the same length, two of them approximately horizontal and adapted to be secured to apole by a through-bolt through the pole, the third pipe extending diagonally, means carrying the lower end or" the third pipe and adapted to be secured to the pole, a bracket to which are secured the outer ends of the horizontal pipes, a pulley journaled in said bracket, means for securing the outer end of the diagonal pipe to the bracket, a bracket secured to .the pole adjacent said horizontal pipes, a pulley journaled in said bracket, each pulley having its axis substantially in the horizontal plane of the horizontal pipes, the axis of the outer pulley passing near or through the axis of the diagonal pipe, a rope passing over the ulleys {one eclegitecl: to oarryze eti-eetilamp, e ha-ngerritor themtheneno -the-11zp fli11d .yineans, If'on attaching the ope 1 thereto.

-9Q-A mast-arm, comprising thi'ee pipes. :of thesaimeklengtlytwo of them; aippi'ox imately @honizontal: and aclznptecl to he secured to: a pole lay i a through-bolt through ithe; :13018, the 1 third 'ipipeextending @dieg'o112tllymancl bolt :extenicling horizontally theTBthmt gh mind mlztptecl toseonie: the onteiiendsrof-the .2 A

journelecl on said holt, meanscfioimseeuring" the lon -ter 6116. of 1,- :the thegonalupipe 9 to i the bracket, (s b-racket. secured to-itheepole iaclrjaoent sa-icl: ho izontal pipes,- and? aapnlley rjoui'nal'ecl iii-said: hmokehweeh pulley 1hav- :ing its axis-l Substantially in the: horizontal plane 'of Ethel horizontal -pipes',' the; taxis of the outer pulley passingenear on thvrough the axis oi the tlmgonal pipe.

- 10..A mastermwooinpris ng :th-nee pipes :of th-ewsame: length,- two iOf ,'lll1Q111,,tp pI OX- 11112112813 horizontal and adaptecltohe sethe pol e,the third pipe entenglingrtliago nally, a elevis carrying the lower: end of the V thi -cl pipe entl acleptetlto heyseounecltohthe V min p'ol e, iabracfket,= aiholt extendinghorizontally I thereth-roughand aclsptecl to 2=SBGUT8 the outei encls of ithei:horizontal pipes to the bracket, 21-, pulley jou'wnaleclon said bolt,

mean'sftor isecuringllllBs0lltQI end of the =cliagonal pipe toethe hreoket, a braokettsecunecl to the pole adjacent saicl horizontal pipes, a pulleyojouizna-lecl sinwsaicl bracket,

aen pulley having :its axis substantially in the horizontal plane of :the' horizontal pipes,

the axisof the 'outenspulley'passing near or tlirouglwtlie axis of thecliagon'al- 'pipe, a rope passing oven 'the pulleys and adapted streetwlampmnd a llQElIQKlM hl QZ ipie, e. othe 'meens: .11 ouriii thenontergen'cl; :of the diagonal y 1e toithe hi'noket, aub m oket se pip ,,a-i;p l;ley;= flour-nalfedfin seiclizbmolget, each, pulley heviinglnitsa isasuhstahtiiiilly {in the:howizonta-ligplene to tl :pipee; theiaxis of :the eeter pinlley; ipz ssing near or a thi'ou gh tlie;ira;xi si iof the eliegfllml 'EPlPQ-yfilt ii'0 )e ipe,ssing 'xzelf-nt hegptilleys and adapted 'PEOnyC-RLI'V H' S .Ql 1l3BI" I1Cli:a; :lstteet ,lainpnndqiti enclwerhangei ieiefon- 1 adeptecli itoiabe atv0 ,sofitlle ie eprox-i ie horizontal Gui-ed to the j pole mtg extents ai cl horizzontal V itzioheclto ithe, fioleqenclizhaming a;=poi\tion speoecl Git 1 0111 r the poleizfaliclitnotoheda iat edifi-iie 'ent (heights; the guppergenolwof eeolpnotoh ihe ngr ofi-reclueecl diameter,gentlotheq Strain iins'nleton havingfe; studa-comprisingqa shank slide a -nose, the-. shank ehelng of; smaller climneterthan the: upper end of eaohi notch,

the nose being of: larger {Clll lllltfll'utlllll such iuppen end 1 but; of smallermliameter than 'anotherwpontion offthe-notch,

' 1 lnntestimony whereof; halve signed my "name to this specification .QZthLlay -Qf" V :Deoember, 1922:.

wiignmi-Minosi sni 

